early phase of an embryo following the first cleavages associated with the ovum additionally the level of cells that early embryo is made up
- a layer of cells on the inside of the blastula
- The germinal membrane in an ovum, from where the embryo is created.
(letter.) The germinal membrane in an ovum, that the embryo is developed.
The segmentation of the fertilized nucleus results in the formation of a number of nuclei which arrange themselves around the periphery of the egg and, the protoplasm surrounding them becoming constricted, a blastoderm or layer of cells, enclosing the central yolk, is formed.